A1706 MBP 820-00239-09 Issues

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Blue99ls1
    New Member
    • Sep 2022
    • 5
    • Usa
    #1

    A1706 MBP 820-00239-09 Issues

    I have a 2016 A1706 Macbook Pro touchbar.

    Board will take 20.1 v from charger. Amps range from .4 to .9. Jump back and forth.

    Fans turn on, beeps when plug charger up, and caps lock light will turn on and off.

    13.1 V stable at ppbus.

    Board is clean, no obvious burnt chips, no water damage.

    CPU never gets warm and no display.

    Where to go from here. Im Stumped.
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14681
      • Canada
      #2
      Re: A1706 MBP 820-00239-09 Issues

      Try a SMC reset.

        Comment

        • Blue99ls1
          New Member
          • Sep 2022
          • 5
          • Usa
          #3
          Re: A1706 MBP 820-00239-09 Issues

          Tried that still same result.

          Should the C1161 (located below CPU) read to ground on pins 1 and 3. According to boardview. Pin 1 is ppvccgt_s0_cpu and 2 is ground. But both read to ground terminals

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14681
              • Canada
              #4
              Re: A1706 MBP 820-00239-09 Issues

              No, but be careful on your measurements. How accurate is your multimeter?

              Select the lowest scale on your tool -> remove all power -> now measure the resistance to ground with your multimeter.

              Being a CPU, it is a low voltage semiconductor and the resistance is expected to be low.

              What is the EXACT resistance in ohms that your meter is reading ?

              From past experience, we had an A1398 CPU @ 1 ohms and the logic board worked fine (measured on our Fluke 87V meter).

                Comment

                • Blue99ls1
                  New Member
                  • Sep 2022
                  • 5
                  • Usa
                  #5
                  Re: A1706 MBP 820-00239-09 Issues

                  Meter is a milwaukee TRMS, not a expensive meter. I have a couple of flukes at my office that are more accurate, im sure. This is just the meter i use everyday to do electrical work.

                  I am getting 4.9 ohms between ground and pin 1. Which seems quite high

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 14681
                      • Canada
                      #6
                      Re: A1706 MBP 820-00239-09 Issues

                      I think you are fine here. In diode mode, the meter will beep as a short condition.

                        Comment

                        • Blue99ls1
                          New Member
                          • Sep 2022
                          • 5
                          • Usa
                          #7
                          Re: A1706 MBP 820-00239-09 Issues

                          I also did notice with my thermal cam that the cpu was getting warm. That’s how I zeroed in on this chip. It was showing hot on the thermal cam.

                          I can plug power up and hear the beep, like plugging in a iPhone to charge. Fans start spinning, caps lock light will turn on and off, and fans then start spinning faster, like top speed. But nothing else happens. All usb c ports get same result.

                            Comment

                            • mon2
                              Badcaps Legend
                              • Dec 2019
                              • 14681
                              • Canada
                              #8
                              Re: A1706 MBP 820-00239-09 Issues

                              https://boards.rossmanngroup.com/thr...booting.58607/

                                Comment

                                Previous template Next

                                Related Topics

                                Collapse
                                • jkruns
                                  M1 A2338 screen and touchbar issues after cleaning up liquid damage
                                  by jkruns
                                  Hello everyone,

                                  This is my first post after browsing this wonderful treasure trove of knowledge for many, many evenings. I've decided to learn how to fix these things, properly.

                                  My patient is an A2338 Macbook Pro M1 (late 2020).

                                  It had some corrosion around JT710 and JT700 caused by liquid spill, as well as against the protective barrier around the USB-C chips UF000 and UF100. So I took the main board out and cleaned it with a toothbrush and alcohol, then with alcohol in an ultrasonic cleaner. Cleaned the touchbar flex connectors as well. The board looks...
                                  04-22-2024, 06:45 AM
                                • Document Archive
                                  ISL88739AHRZ ISL88739 Laptop Battery Charger Datasheet
                                  by Document Archive
                                  The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
                                  configurable for operating as either a Hybrid Power Boost (HPB)
                                  charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
                                  4-cell batteries. Both configurations allow the battery to work with
                                  the adapter together to supply the system load when it exceeds
                                  the adapter capability, referred to as system Turbo mode. HPB
                                  charger configuration reverse-boosts battery energy to the system
                                  bus to help the adapter provide the system power in Turbo mode.
                                  NVDC charger configuration...
                                  11-05-2024, 03:28 PM
                                • flat-earther
                                  how to prevent a connected charger from draining battery when not charging?
                                  by flat-earther
                                  I have an RC radio handset(Taranis QX7) which doesn't have internal battery charger which means I had to remove the battery every time I needed to charge it.
                                  So to improve it, I added a 15W USB-C charger board(link) inside and soldered it to the same connector on the PCB where the battery plugs into, great, now I can simply charge it with a USB-C cable.

                                  but the problem I found is that after the radio sat for two weeks without being used the 2S 18650 battery that I'm using was at 4.2V!
                                  So the battery is backfeeding the charger and being drained.

                                  How can I prevent...
                                  08-07-2025, 01:04 PM
                                • flat-earther
                                  ASUS X54H laptop thinks it's always charging even with charger unplugged
                                  by flat-earther
                                  The charging indicator light on my ASUS X54H laptop is always on even when the charger is disconnected.

                                  Windows also shows ''Plugged in'' when charger is not connected.

                                  This problem started year ago gradually, when unplugging the charger the charging light took several seconds to disappear, then minutes, and now almost always on even when unplugged for an entire day.
                                  Strangely, before sometimes immediately when plugging in the charger the charging light went away, and later came back with it connected.
                                  If I let battery run out and say it has 3% Windows will...
                                  06-24-2025, 09:32 AM
                                • coasterghost
                                  Lenovo T14 Gen 2 Type 20XK Model 20XK0069US Odd Charging Issues
                                  by coasterghost
                                  For Badcaps Readers, Please note that I am hopefully going to present this same message to Lenovo to see if they have any insight to the matter as well and figured to share the entirety here for clarification. The System is out of warranty as it is but does have the option to have it extended.

                                  Model Information: T14 Gen 2 (Type 20XK, 20XL) Laptop (ThinkPad) - Type 20XK - Model 20XK0069US
                                  Board: T14 Gen 2 (Type 20XK, 20XL) - Type 20XK.

                                  System Hardware:
                                  Processor: AMD Ryzen 7 PRO 5850U
                                  Memory: 1x 16GB DDR4 3200 (Soldered on Board); 1x Crucial 32GB DDR4...
                                  09-08-2025, 10:46 PM
                                • Loading...
                                • No more items.
                                Working...